svn commit: r250659 - in head: . share/mk tools/build/options tools/tools/makeroot

[Brooks Davis]

On Wed, May 15, 2013 at 10:10:13AM -0500, Garrett Cooper wrote:
> On May 15, 2013, at 9:30 AM, Brooks Davis wrote:
> 
> > Author: brooks
> > Date: Wed May 15 14:30:03 2013
> > New Revision: 250659
> > URL: http://svnweb.freebsd.org/changeset/base/250659
> > 
> > Log:
> >  Add support for an external cross compiler.  The cross compiler is
> >  specified by passing the XCC, XCXX, and XCPP variables (corresponding to
> >  CC, CXX, and CPP) to buildworld/buildkernel.  The compiler must be clang
> >  or be configured to target the appropriate architecture.
> > 
> >  To speed build times, if XCC is an absolute path or
> >  WITHOUT_CROSS_COMPILER is defined then no cross compiler will be built
> >  during the cross-tools stage.
> > 
> >  Limited documentation of this feature can currently be found at:
> > 
> >  https://wiki.freebsd.org/ExternalToolchain
> > 
> >  This functionality should be considered experimental and is subject to
> >  change without notice.
> 
> 	Seems like this code could/should be integrated in with conf/163778 (in particular the bits that Warner provided to share/mk/sys.mk that I integrated in my larger patch).
> 

The patch in conf/163778 seems to combine several unrelated things.  I
don't know what the usecase is for ${AWK}, but it should certainly be
committed on it's own if it is committed.

The reason I rejected the ${__X} approach is that it requires a 
fixed naming convention that doesn't work at all for compilers.  I think
it's a somewhat better idea for binutils, but we'll probably break the
convention at least initially with mclinker.

-- Brooks
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